Method of treating metals.



H. D. MILLER. METHQD 0F TREATING METALS. APPLICATION FILED 001'. 12, 1907.

Patented Oct. 909.

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WITNESSES." INVENTOR. 0 .W/QM. AM

' H. D. MILLER.

METHOD OF TREATING METALS.

APPLICATION FILED OCT. 12, 1997.

Patented Oct. 12, 1909.

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INVENTOR 71M=.,1e..w 4 .1 410% ii iii "UNITED s'rATns ion.

HARRY D. MILLER, OF PITTSBUBG, PENNSYLVANIA, ASSIGNOR T0 MILLER NON- connosivn METAL c'oMrAnY, or PENNSYLVANIA.

or rir'rssune, rsnnsrnvanm, A coaronnrzon inn-rerun or rnnn'rme METALS.

Application filed October 12, 1907. Serial No. 397,119.

To all whom it may concern:

Be it known that I, HARRY D. MILLER, of the city of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a certain'new and useful Method of Treating Metal, of which the following is a full, clear, and exact description,referencebe ing had to the forming part of this specification, in Wl1lCl1 Figure l is a plan View of apparatus which may be employed in the practice of my invention; Fig. 2 is a side elevation of the same partly in section; Fig. 3 is a front elevation; Figs. e and 5 are detached views of portions ofthe surface of the rolls; 'Fig. 6 is a side elevation partly in section of a modification; and Fig. 7 is a detached view of the nozzle.

My inventionrelates to a method of increasing the durability and non-cerrosiveness of steel and other metals, and it consists in applying a cooling medium to the surface Although I do not desire to limit myself.

to any specific means for stiffening the surface of heated metal preparatory toits compression, I will now describe apparatus which may be employed in the practice of my invention.

- In the drawing I show a three-high stand of rolls, a, Z), and c, the surface of which may be roughened by cuttingthereon any desired pattern, such as, for instance, the pattern shown in Figs. 3, 4, and 5, which Is composed on the middle rolls a, of the annular grooves 3 and the cross grooves 4, and on the upper and bottom rolls, of the cross grooves 4- and the diamond shaped recesses 5.

In Figs. 1, 2 and 6 I show apparatus which may be employed'in applying a fluid medium to the faces of the bloom, plate, or other shape of metal, as it passes through the roughened rolls prior to the compression of the surface thereof. This apparatus may consist of rows of horizontal perforated pipes 7 and 7 which are connected with the supply conduit 8, the parts belng so an ranged as to distribute the required fluid over the roughened surface or PI'OJGCtlOIlS, formed by the pattern on the rolls,.as the metal leaves same. I y .'In Figs. 6 and 7, I show nozzles 9 comthe various passes-between the accompanying drawings,

passes between the As these municating by the conduits 10 with the fans 11. Communicating with the conduits 10 are receptacles 12 adapted to contain the liquid cooling medium.

The operation of my method as it may be practiced with this apparatus is as follows: The bloom, plate, or other shape ofmetal, having'been brought to a rolling heat in a suitable heating furnace, is given several rolls a, b, and c, which the surface of the metal. projections are formed, and as the piece of metal emerges from, the pass, the surface of the projections is chilled by contact with the cooling medium issuing from the pipes 7 7, o'r nozzles 9, which stifi'ens the same. By thus forming the face of the metal 'into a series of ribs and pyramidal projections, the area of the surface which is form projections on exposed to'th'e action of the cooling medium and the rapidity and is greatly increased, extent of the action greatly facilitated. When a surface skin of required thickness has been formed in this manner, the metal is carried to the finishing rolls and given one or more passes, while the body of the metal is still hot, and before the stilfened skin has had time to lose the characteristics imparted to it by the fluid blast, or spray of air, or other cooling medium. The efi'ect of these operations is to condense the surface skin of the metal, rendering it more compact and durable with increased non-corrosive properties.

I do not desire'to limit myself to any spe cific fluid medium, as air, steam orother' gas, fluids, liquids, hydrocarbons, or solutions of chemical compounds may be employcd. For example, I have used with great advantage in certain cases a solution of potassium bichromate. Other solutions having similar effects on the heated surface of the corrugated plate may also be used Although I have described rolling and have shown and described particular roughing rolls having a definite pattern marked thereomand although I have shown and described apparatus for applying the fluid medium. to the metal, I do not desire to limit myself to the roughening of the metal or to the use of any desire to limit myself to rolling, as stamping, pressing, or squealing me -be substituted for the rolling process. is not necessary that the roughening and the Patented o r. 12, race.

specific apparatus, nor do I oreover, it

application of the fluid medium should be simultaneous or immediately successive in point of time, as We may first roughen or corrugate the sheet, then reheat it, and then apply the fluid medium to establish a surface skin.

"Having thus described my invention, What I claim and desire to secure by Letters Patent is: I

l. The method of treating metals consisting in first roughening the surface of the heated metal, then applying a cooling medium thereto, and finally compressing the roughened surface to a substantially smooth surface, While the metal is still hot.

2. The method of treating metals consisting in forming ridges or projections on the surface of the heated metal, applying a cool- HARRY n. MILLER.

Witnesses:

M. A. EARTH, M. A.,KELLER. 

